Lønnøgle (cipher key) - used to decode a specific set of lønrunes
This is one of a number of Icelandic magical staves, said to bring benefits to those who carry them. These staves come from a variety of Icelandic grimoires from the 17th century and later. This talisman is called Brýnslustafir and is for use on whetstones to aid in the sharpening of blades. When carried on your person, it can help sharpen your mind and focus your thoughts. Good for study and when you really need to focus on a project.